package com.leyou.mail.utils;

import com.leyou.mail.config.MailProperties;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;
import java.util.concurrent.TimeUnit;

/**
 * 发邮件工具类
 */
@Component
@EnableConfigurationProperties(MailProperties.class)
public final class MailUtils {
    //private static final String USER = "927953292@qq.com"; // 发件人称号，同邮箱地址
    //private static final String PASSWORD = "aeppfuyxxjubbfgd"; // 如果是qq邮箱可以使户端授权码，或者登录密码
          @Autowired
        private MailProperties mailProperties;

          @Autowired
          private StringRedisTemplate redisTemplate;

          private static final String key_prefix = "mail:to";
          private static final Long mail_min_interval_in_millis=60000L;

        private final Logger log = LoggerFactory.getLogger(MailUtils.class);

    /**
     *
     * @param to 收件人邮箱
     * @param text 邮件正文
     * @param title 标题
     */
    /* 发送验证信息的邮件 */
    public  boolean sendMail(String to, String text, String title){

        //TODO  限流，按照邮箱号码限流reis
        final String lastTime = redisTemplate.opsForValue().get(key_prefix + to);
        if (StringUtils.isNotBlank(lastTime)){  //key存在,
            log.info("邮件发送频率过高，被拦截");
            return false ;
        }

        try {
            final Properties props = new Properties();
            props.put("mail.smtp.auth", "true");
            props.put("mail.smtp.host", "smtp.qq.com");

            // 发件人的账号
            props.put("mail.user", mailProperties.getUser());
            //发件人的密码
            props.put("mail.password", mailProperties.getPassword());

            // 构建授权信息，用于进行SMTP进行身份验证
            Authenticator authenticator = new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    // 用户名、密码
                    String userName = props.getProperty("mail.user");
                    String password = props.getProperty("mail.password");
                    return new PasswordAuthentication(userName, password);
                }
            };
            // 使用环境属性和授权信息，创建邮件会话
            Session mailSession = Session.getInstance(props, authenticator);
            // 创建邮件消息
            MimeMessage message = new MimeMessage(mailSession);
            // 设置发件人
            String username = props.getProperty("mail.user");
            InternetAddress form = new InternetAddress(username);
            message.setFrom(form);

            // 设置收件人
            InternetAddress toAddress = new InternetAddress(to);
            message.setRecipient(Message.RecipientType.TO, toAddress);

            // 设置邮件标题
            message.setSubject(title);

            // 设置邮件的内容体
            message.setContent(text, "text/html;charset=UTF-8");
            // 发送邮件
            Transport.send(message);

            //发送成功后写入redis.肯很多微服务用到这个短信微服务，所以加前缀,并且设置超时时间为一分钟
            redisTemplate.opsForValue().set(key_prefix+to,String.valueOf(System.currentTimeMillis()),1, TimeUnit.MINUTES);
            log.info("验证邮箱发送成功");
            return true;
        }catch (Exception e){
            e.printStackTrace();
            log.error("短信调用异常");
        }
        return false;
    }




}
